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Vulnerability record · CVE-2026-61898 · published 20 August 2026

CVE-2026-61898: OS command injection vulnerability

The Ubuntu-specific language helper scripts (save-to-pam-env, update-langlist) shipped with accountsservice before 23.13.9-8ubuntu7 treat the user-controlled LANGUAGE entry in ~/.pam_environment as trusted input. The value is interpolated unescaped into a GNU sed replacement expression, allowing an attacker to inject a sed 'e' flag and arbitrary shell commands that execute with the privileges of the AccountsService helper process (real UID 0) via the SetLanguage D-Bus method.

7.8 CVSS 3.1 High EPSS 0.19% · top 92.4% CWE-78 · OS command injection Awaiting Analysis
7.8CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
28 Aug 2026Last modified by NVD

Description

The Ubuntu-specific language helper scripts (save-to-pam-env, update-langlist) shipped with accountsservice before 23.13.9-8ubuntu7 treat the user-controlled LANGUAGE entry in ~/.pam_environment as trusted input. The value is interpolated unescaped into a GNU sed replacement expression, allowing an attacker to inject a sed 'e' flag and arbitrary shell commands that execute with the privileges of the AccountsService helper process (real UID 0) via the SetLanguage D-Bus method.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/2157985
https://ubuntu.com/security/CVE-2026-61898

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Source: NIST National Vulnerability Database (record CVE-2026-61898), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.